Welch™ DryFast™ and DryFast Ultra™ Chemical Duty Vacuum Pumps

Designed for use with rotary evaporators, concentrators and vacuum ovens

Manufacturer: Welch™ 2034B01

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Catalog No. 01-257-502

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    Air Displacement 25L/min.
    Max. Pressure 9 torr
    Includes Pump, 6 ft powercord and plug (115V US standard)
    For Use With (Application) Rotary Evap. BP to 100°C
    Length (English) 13.8 in.
    Length (Metric) 35.2cm
    Shipping Weight (English) 25 lb.
    Certifications/Compliance CE, CSA
    Horsepower 0.2hp
    Pump Head Material PTFE
    Electrical Requirements 115V 60Hz
    For Tube Size (English) 0.25 in.
    For Tube Size (Metric) 0.63cm
    Material PTFE, Perfluoroelastomer
    Model 2034
    Weight (English) 21.25 lb.
    Weight (Metric) 9.6kg
    Height (English) 8.8 in.
    Height (Metric) 22.3cm
    Width (English) 6.8 in.
    Shipping Weight (Metric) 11.3kg
    Voltage 115V
    Hertz 60Hz

    Use these oil-free DryFast vacuum pumps for applications requiring chemical resistance. DryFast pumps provide mid-range vacuum (2 to 79 torr) with easy adjustment and low maintenance. Flow rates from 25 to 70 L/min). Select a DryFast model to suit your application needs:


    • Rotary Evaporation to 40°C atmospheric B.P.: 2014B-01 (1-head design)
    • Rotary Evaporation to 100°C atmospheric B.P.: 2034B-01, 2044B-01
    • Rotary Evaporation to 40°C atmospheric B.P.: 2032B-01, 2042B-01
    • Vacuum Filtration to 2 funnels: 2014B-01 (1-head design)
    • Vacuum Filtration to 6 funnels: 2037B-01, 2047B-01
    • Vacuum Ovens to 1.5 ft³: 2042B-01
    • Vacuum Ovens to 4.5 ft³: 2047B-01

    Design Advantages
    • PTFE / fluorinated contact surfaces
    • Efficient 2-head diaphragm design reduces maintenance
    • Advanced Vapor Management knob for easy vacuum adjustment
    • Compact, portable, quiet
    • Readily connects using ¼ in. ID tubing
    • All listed models 115V 60 Hz

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